Mitsubishi Electric MSZ-GE22VA, MSZ-GE25VA, MSZ-GE35VA, MSZ-GE42VA, MSZ-GE50VA Service Manual

CONTENTS

1. TECHNICAL CHANGES ··································· 3

2. PART NAMES AND FUNCTIONS ····················· 4

3. SPECIFICATION ················································ 5

4. NOISE CRITERIA CURVES ······························ 6

5. OUTLINES AND DIMENSIONS ························ 7

6. WIRING DIAGRAM ············································ 8

7. REFRIGERANT SYSTEM DIAGRAM ··············· 9

8. SERVICE FUNCTIONS ··································· 10

9. MICROPROCESSOR CONTROL ··················· 12

10. TROUBLESHOOTING ····································· 18

11. DISASSEMBLY INSTRUCTIONS ···················· 32

SPLIT-TYPE AIR CONDITIONERS

Outdoor unit service manual
MUZ-GE·VA Series (OBH516)
MXZ-A·VA Series (OB377)
MXZ-8A140A (OC316)

SERVICE MANUAL

No. OBH515

REVISED EDITION-B

INDOOR UNIT

PARTS CATALOG (OBB515)

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

Models

MSZ-GE22VA -

E1

MSZ-GE25VA -

E1

MSZ-GE35VA -

E1

MSZ-GE42VA -

E1

MSZ-GE50VA -

E1

Revision B:

• MSZ-GE42/50VA - E1 has been added.

Please void OBH515 REVISED EDITION-A.

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Revision A:

• 11. DISASSEMBLY INSTRUCTIONS has been corrected.
11-6. Photo 9 has been changed.

Revision B:

• MSZ-GE42/50VA - E1 has been added.

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MSZ-GE22VA -

E1

MSZ-GE25VA -

E1

MSZ-GE35VA -

E1

MSZ-GE42VA -

E1

MSZ-GE50VA -

E1

1. New model.

TECHNICAL CHANGES

1

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ACCESSORIES

Installation plate 1
Installation plate fi xing screw 4 × 25 mm 5
Remote controller holder 1
Fixing screw for 3.5 × 1.6 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (Used for left or left-rear piping) 1

Remote controller

Operation indicator lamp

Remote control receiving section

Emergency operation switch (E.O. SW)

Horizontal vane

Vertical vane

Air outlet

Fan

Air filter
(Catechin air filter)

Air inlet

Heat exchanger

Front panel

Fan guard

Air cleaning filter
(Anti-Allergy Enzyme
Filter, option)

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

PART NAMES AND FUNCTIONS

2

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Indoor model MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

Power supply Single phase 230 V, 50 Hz

Electrical

data

Power
input 1

Cooling

W

22 29

43

Heating 23

30 39

Running
current 1

Cooling

A

0.22 0.29

0.39

Heating 0.23

0.31 0.36

Fan

motor

Model RC0J40-FK

Current
1

Cooling

A

0.22 0.29

0.39

Heating 0.23 0.31 0.36
Dimensions W × H × D mm 798 × 295 × 232
Weight kg

10

Special remarks

Air direction 5

Airfl ow

Cooling

Super High

m

3

/h

678

762 768 906

High

546 (552 2)

624 714

Med.

402 402 (414 2)

516 576

Low

288 (276 2) 288

408 468

Silent

246

348 390

Heating

Super High

m

3

/h

690 786 870

High

546 624 732

Med.

396 402 516 576

Low

288 (276 2) 288 420 468

Silent

246 348 390

Sound level

Cooling

Super High

dB(A)

42

43 46 49

High

36

40 44

Med.

29

30 35 38

Low

21

22 30 33

Silent

19

26 28

Heating

Super High

dB(A)

42 46 48

High

36 40 43

Med.

29 30 35 37

Low

21 22 30 33

Silent

19 26 28

Fan speed

Cooling

Super High

rpm

1,020 1,120 1,120 1,280
High 860 950 1,060
Med. 670 670 (690

2) 810 890
Low 530 680 750
Silent 470 600 650 (690 2)

Heating

Super High

rpm

1,040 1,140 1,240
High 860 (700 2) 950 (930 2) 1,080 (930 2)
Med. 670 (610

2) 810 890 (840 2)

Low 530

690 750

Silent 470

600 650

Fan speed regulator 5

Remote controller model KM09A

NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C
Heating: Indoor Dry-bulb temperature 20°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C

1 Measured under rated operating frequency.

2 For multi system.

Specifications and rating conditions of main electric parts

Fuse

(

F11)

T3.15AL250V
Horizontal vane motor (MV) 12 VDC
Varistor (NR11) S10K300E3K1 (ERZV14D471)
Terminal block

(TB)

3P

SPECIFICATION

3

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MSZ-GE22VA MSZ-GE25VA

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

43
42

NC-10

MSZ-GE35VA

Test conditions

Cooling: Dry-bulb temperature 27°C

Wet-bulb temperature 19°C

Heating: Dry-bulb temperature 20°C

INDOOR UNIT

WALL

MICROPHONE

0.8m

1m

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

42
42

NC-10

NOISE CRITERIA CURVES

4

MSZ-GE42VA

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

49
48

NC-10

MSZ-GE50VA

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION

SPL(dB(A))

LINE

Super High

FAN SPEED

HEATING

46
46

NC-10

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Unit: mm

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

211.5

231.5

253

21.5

155 155

80

80

225 225

3

19

159

58

5

232

56

69

798
785 6.5

13061950

295

50

42

56

43

42

8

100

107

112

45

56

69

33861

212.5

254

41

42

315 84

11×26 Oblong hole

11×20 Oblong hole

Installation plate

Indoor unit

Wall hole ø65

Air in

Air out

Installation plate

Piping

Drain hose

Piping

Insulation ø35 O.D

Liquid line ø6.35 - 0.5 m (Flared connection ø6.35)

Gas line ø9.52 - 0.43 m

(Flared connection: ø9.52 (22/25/35/42), ø12.7 (50))

Drain hose Insulation ø28 O.D Connected part ø16 O.D

OUTLINES AND DIMENSIONS

5

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MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA

WIRING DIAGRAM

6

MSZ-GE42VA MSZ-GE50VA

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Indoor
heat
exchanger

Flared connection

Room temperature
thermistor
RT11

Flared connection

Refrigerant pipe ø9.52 (GE22/25/35/42)
ø12.7 (GE50)
(with heat insulator)

Refrigerant pipe ø6.35
(with heat insulator)

Indoor coil
thermistor
RT12 (main)

Indoor coil
thermistor
RT13 (sub)

Refrigerant flow in cooling
Refrigerant flow in heating

Unit: mm

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

REFRIGERANT SYSTEM DIAGRAM

7

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8-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board.
The time will be shortened as follows. (Refer to 10-7.2.)
Set time: 1 minute → 1 second
Set time: 3 minutes → 3 seconds (It takes 3 minutes for the compressor to start operation. However, the starting time is
shortened by short circuit-of JPG and JPS.)

8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.

How to modify the remote controller P.C. board

Remove batteries before modification.
The board has a print as shown below:

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.
After modification, press the RESET button.

NOTE: For modification, take out

the batteries and press
the OPERATE/STOP (ON/
OFF) button twice or 3
times at first.

After modification, put back

the batteries then press the
RESET button.

J2

J1

Table 1

1 unit operation 2 units operation 3 units operation 4 units operation

No. 1 unit No modifi cation Same as at left Same as at left Same as at left

No. 2 unit — Solder J1 Same as at left Same as at left

No. 3 unit — — Solder J2 Same as at left

No. 4 unit — — — Solder both J1 and J2

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote
controller for the indoor unit.
The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are
set.
The setting will be cancelled if the breaker is turned OFF, or the power supply is shut down.
Please conduct the above setting once again after the power has restored.

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

SERVICE FUNCTIONS

8

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8-3. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed
are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation
in the same mode just before the shutoff of the main power.

Operation

If the main power has been cut, the operation settings remain.
After the power is restored, the unit restarts automatically according to the memory.

(However, it takes at least 3 minutes

for the compressor to start running.)

How to release “AUTO RESTART FUNCTION”

Turn off the main power for the unit.
Solder the jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 10-7.2.)

NOTE:

• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote

controller.

• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is can-

celled.

• If the unit has been off with the remote controller before power failure, the auto restart function does not work as the

power button of the remote controller is OFF.

• To prevent breaker OFF due to the rush of starting current, systematize other home appliance not to turn ON at the same

time.

• When some air conditioners are connected to the same supply system, if they are operated before power failure, the

starting current of all the compressors may flow simultaneously at restart.

Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current

by adding to the system that allows the units to start one by one.

CN 111CN112CN151CN10A

Indoor electronic

control P.C. board

JR07

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